<template>
    <div class="list" ref="wrapper">
		<div>
			<div class="area">
				<div class="title border-topbottom">当前城市</div>
				<div class="button-list">
					<div class="button-warpper">
						<div class="button">{{this.currentCity}}</div>
					</div>
				</div>
			</div>
			<div class="area">
				<div class="title border-topbottom">热门城市</div>
				<div class="button-list">
					<div class="button-warpper" v-for="item of hot" :key="item.id" @click="handleCityClick(item.name)">
						<div class="button">{{item.name}}</div>
					</div>
				</div>
			</div>
			<div class="area" v-for="(value, key) of cities" :key="value.id" :ref="key">
				<div class="title border-topbottom">{{key}}</div>
				<div class="item-list" v-for="item of value" :key="item.id" @click="handleCityClick(item.name)">
					<div class="item border-bottom">{{item.name}}</div>
				</div>
			</div>
		</div>
    </div>
</template>

<script>
import Bscroll from 'better-scroll'
import {mapState, mapMutations} from 'vuex'
export default {
	name: 'CityList',
	props: {
		cities: Object,
		hot: Array,
		letter: String
	},
	methods: {
		handleCityClick (city) {
			this.changeCity(city)
            this.$router.push('/')
		},
		...mapMutations(['changeCity'])
	},
	computed: {
		...mapState({
			currentCity: 'city'
		})
	},
	mounted () {
		this.scroll = new Bscroll(this.$refs.wrapper)
	},
	watch: {
		letter () {
			if (this.letter) {
				const element = this.$refs[this.letter][0]
				this.scroll.scrollToElement(element)
			}
			console.log(this.letter)
		}
	}
}
</script>

<style lang="stylus" scoped>
.border-topbottom
  &:before
    border-color: #ccc
  &:after
    border-color: #ccc
.border-bottom
  &:before
    border-color: #ccc
  &:after
    border-color: #ccc
.list
	position: absolute
	top: 1.58rem
	left: 0
	right: 0
	bottom: 0
	overflow: hidden
	.title
		line-height: .54rem
		background: #eee
		padding-left: .2rem
		color: #666
		font-size: .26rem
	.button-list
		overflow: hidden
		padding: .1rem .6rem .1rem .1rem
		.button-warpper
			float:left
			width: 33.3%
			.button
				margin: .1rem
				padding: .1rem 0
				border: .02rem solid #ccc
				text-align: center
				border-radius: .06rem
	.item-list
		.item
			line-height: .76rem
			color: #666
			padding-left: .2rem
</style>
